david p



(No Model.)

D. P. DAVIS.

. GOVERNOR PORVYENGINBS.

No. 317,098. Patented May 5; 1885.

UNITED STATES4 PATENT .O1-fries. A

DAVID I). DAVIS, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO THE NEW -YORK'SAFETY STEAM POWER COMPANY, OF NEW YORK, N. Y.

GOVERNOR FOR ENGINES.

SPECIFICATION forming part of Letters Patent No. 317,098,4ated May 5,1885.

Application filed February 9, 1885. (No model.) I

.T @ZZ whom it may concern.-

Be it known that l, DAVID If. Dnvrs,of Jersey City, in the county of Hudson and State of New Jersey, have invented an Improvement in Governors for Engines, of which the following is a specification.

In Letters Patent No. 303,711, granted to me August 19, 1884, there are two levers pivoted to a Wheel or arms, and a contractile ro spring between such levers, and a pivoted eccentric.

My present invention is for accomplishing the same object as that set forth in my said patent; but I have simplified the construction,

and make use of a sliding eccentric and an adjustable elliptical spring for regulating the action of the governor and adapting such governor to different speeds of engine.

In the drawings, Figure 1 is an elevation of 2O the governor. Fig. 2 is a section at the line :o az, and Fig. 3 isa section at the line y y.

The lever-arms F G are pivoted ato d to arms or a wheel upon the shaft A; and H H are adjustable weights upon such arms F G,

2 5 and there are links q pivoted upon the arms or cross-bar l?, and o is the axis or shaft passing through the wheel and formed upon or connected to the secondary eccentric N. These l parts are similar to those in my aforesaid pat- I 3o ent, except that the arms F G are made as bent levers, having toe-piecesf g, upon which the ends of the halfelliptic or bow spring K rests. This spring K is sustained by a bolt, 7c, at the middle part, where there is a clippiece, 3, to hold the spring, and the nuts 4 5 bind against lugs 6 7 .uponthe Wheel or arms, and through which nuts and lugs the screwbolt la passes. By moving the nuts 4 5 the center of the spring can be carried bodily 4o either one way or the other, and thereby the pressure of its ends upon the toe-piecesfg can be regulated with great ease and precision. The governor will come into action under greater or less speed, according to the pressure of the spring upon the toe-pieces f g.

The main eccentric surrounds the mainv shaft A, and it has an elongated opening in it; and instead of hanging the main eccentric by a pivoted arm and swinging the same by the 5o secondary eccentric, as in said patent, I provide the main eccentric L with a base having dovetailed flanges l upon one side of it, which flanges pass into similar-shaped slides in the hub of the wheel, so that such eccentric can be moved in such slides transversely, in order that the position of the center of the eccentric may be changed in its relation to the center of the shaft A, the elongated opening allowing of this movement. One of the dovetailed flanges should be movable, so as to ad- 6o just the parts and compensatev wear. This eccentric has an arm, L', extending out at one side of its base, and the shaft ois connected with this arm by a crank or eccentric, so that the partial rotation of this shaft o causes the lateral motion of the eccentric L. I prefer to form with the shaft 0.a secondary eccentric, N, and surround the same with a link that is connected by the bolt s with the outer end of the arm L', so that when the governor arms and 70 weights are thrown ont Vby the centrifugal force the links q will move the arms P, turn the shaft o, and, by the secondary eccentric N and its link, give to the main eccentric the re` quired lateral movement to lessen the throw 7 5 of the steam-valve, and thus regulate the speed of the engine. The spring K gives the reverse movements to the parts when the speed decreases below the regular standard. 8O

It is to be understood that the eccentric ring projects from its base so that none of the other parts will come into contact with the eccentric-rod, that passes off from the eccentric to the valve mechanism. 35

I claim as my invention- 1. The combination, with the eccentric and pivoted governor-arms, of the bow/spring' K, to act at its ends upon the pivoted governor-arms, and means for holding and adjusting the bow-spring, substantially as set forth. v

2. The combination, with the governorarms F G, wheel, and main shaft,of an eccentric surrounding t-he shaft and having an 95 elongated opening for such shaft, a base to the eccentric with flanges, and slides at the hub of the wheel for such flanges, the links q, arms l?, shaft o, secondary eccentric, and connection to the main eccentric, substantially as set forth. roo

3. The combination,with the main shaft and Signed by me this 4th day of February, A. sliding eccentric, of a. secondary eccentric, a D. 1885. shaft for the same, a connection from the secondary eccentric to the base of the main ec- DAVID P. DAVIS. centric, governor-arms and connections between the same and the shaft of the secondary 1Witnesses: eccentric for turning such secondary eccentric, GEO. T. PINCKNEY, substantially as set forth. WILLIAM G. MoT'r. 

